Buttonhole-sewing machine.



AGsS. HILL.

BUTTONHOLE SEWING MACHINE.

APPL|CAI|ON FILED OCT- 28, 1915.

Patented July 10, 1917.

- 2 SHEETS-SHEET 1.

e. s. HIL L. BUTTONHOLE SEWING MACHINE.

APPLICATION men ocT. 2B, 1915.

Patented July 10, 1917.

.2 SHEETS-SHEET 2- ins "A111? onnro.

GEORGE S. HILL, 0F STRAEFORD, NEW HAMPSHIRE, ASSIGNOB T0 UNITED SHOE MACHINERY COMPANY, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

BUTTONHOLE-SEWING nnonrnn.

Specification of Letters Patent.

PatentedJuly 10, 1917..

To all whom it may concern:

Be it known that I, GEORGE S. HILL, a citizen of the United States, residing at Strafiord, in the county of Straftord and State of New Hampshire, have invented certain new and useful Improvements in Buttonhole-Sewing Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to that class of buttonhole sewing machines in which the stitch forming mechanism is rotated during the sewing about the ends of a buttonhole.

The invention is intended primarily as an improvement in the buttonhole sewing machine shown and described in Patent No. 1,063,880, June 3, 1913, although it is not confined in its application to this machine,

but may be embodied with advantage in other machines.

In the machine of the above patent the stitch forming mechanism is rotated rotation after rotation in the same direction in sewing about successive buttonholes, and in order to prevent the twisting together of the stay and under threads they are led to the turret on which the under thread mechanism is mounted through thread-supply guides which are rotated in unison with the turret and in the opposite direction. The threads lead horizontally from the threadsupply guides to the turret guides, and it has been, found that with certain kinds of threads they may become entwined or twisted betweenthe two sets of guides to such an extent as to interfere with the proper operation of the machine.

It is the object of the present invention to provide novel and improved thread guiding devices for maintaining the threads between the thread-supply and turret guides in such relation to each other that they will not become entangled or twisted together. To that end the invention comprises the fea tures of construction and combinations of parts hereinafter described and referred to in the claims.

The invention will be readily understood from an inspection of the accompanying drawings and the following detailed de-' scription of the mechanism illustrated therein.

In the drawings, Figure 1 is a side elevation, partly in section, showing so much of 1 a buttonhole sewing machine as is necessary to illustrate the application of the present invention thereto; Fig. 2 is a detail side elevation of the thread guiding and separating devices; and Fig. 8 is a horizontal view of the same devices.

In the drawings the invention is shown as embodied in the buttonhole sewing machine shown and described in Patent No. 1,063,880 above referred to. In this machine the stitch forming mechanism comprises an upper needle 2, an under needle 4, and a looper 6. The upper needle is eccentrically secured to a reciprocating needle bar 8 which is mounted in a rotary sleeve 10. The under thread mechanism is mounted in a turret 12 which is rotated in unison with the sleeve 10 carrying the upper needle bar during the sewing, the turret and sleeve beinggiven a single revolution during the sewing of each buttonhole, and being rotated rotation after rotation in the same direction in sewing successive buttonholes. The under sewing thread and the stay cord or thread are led to the thread guiding and handling devices on the -turret through the hollow link 14 which is carried by the turret and forms a part of the mechanism through which the under thread mechanism is actuated. The lower end of the link is provided with an outwardly flaring sleeve 16 in which the inturned guides 18 for the sewing and stay threads are formed. To avoid the twisting together of the stay and sewing threads by the successive rotations of the turret in the,

same direction, the threads are supplied through a vertical guide tube 20 which is driven through a sprocket wheel 22 secured to its lower end in a direction opposite to that of the turret, and is given a rotation for each rotation of the turret. The guide tube carries a support 24 for one of the threads, preferably the stay thread, and also carries a guide 26 through which the sewing thread passes. The stay thread is led from the thread supply on the support 24 down through the tube 20, while the sewing thread is led from its supply through the guide 26, which directs the thread from a point in line with the axis of the tube20 down about the stay thread supply and into the tube 20 below the support 24.

The threads lead through guides located at or near the lower end of the tube20 to o theizbearings 32 and supportingthe shaft.

Thea-bearings are-formed in: a bracket 34:

' *whichwis secured tothe under side 'of the cam' support- 36, and is constructedtosupport the shaft in an approximately :horizonlower end of the lim: 1%, and with thezother 'wend adj acentto the lower'end of'the'tube 20.

The spreader disks 30 are each iprov-ided with threadiguides which are preferably xarrangedion; diametrically opposite sides of athe shaft. 'The shaft isdriveninunison withathe guide tube through a link 38,

' "'onezend ofwhichis connected by anniversalojoint with the rear end of the-shaft 28, and the other end of which is connected by a universal joint with the driving sprocket 22 for 'the tube-=20. 'As shown, "thevlower wend ofthew1ink-38 is bifurcated toembrace ar-di'sk- 40; and is pivotally' connected with the disk by the diametrically opposite pivot .:-r=tscrewsi42. The disk 40 is alsoconnected with an 44 secured to the end of the *eshaft :28, 'and provided with a bifurcated I mend carrying the diametrically opposite "pivot screws 46 for engaging the disk 40.

TT-heiupper end of the link 38 is bifurcated toiembraceawdisk48, anclis connectedwith 'wthe disk by the epivot' screws 50. The disk 5 4:8 iseonnected with the-sprocket 22 by .an earm152, zthe end of which isabifurcated and ..=is provided with pivot screws 54L engaging "the "disk The'disks 40-and 4L8'forming parts: of the universaljoints arenprovided with thread'guides through which the stay 4'5 and sewing threads are 'led'f-rom the lower aendp'ofthe tube '20 to the first spreader disk30 on"the shaft 28.

r The ab'ove construction forms: a simple andndurable"guiding means for'preventing ithe-. im proper contact or entanglement of the threads whichis 4 not liable to--become -i'def'ective or inefficient through continued -s -use,-'Jand*which will notcollect :and disa tribute I; oil :IIPOIL the threads.

55' fi'W-hilei *cific construction and arrangement or parts *shown and: described in embodying thein- "vention" 5 in the machine 1 of the patent rei ferred to, it will :be understood" that'fithis Q construction "and arrangement is not: essential to ithe broader features of the invention, and may be varied-and niodified'as found desirableor best suited to the constructionof the machine which it is to be embodied.

talc-position with one end adjacent toithe this preferred to .employfthe spe- Having explained the nature and object -of the invention, and specifically described .one'form of machine in which it may be embodied, what is claimed is L-A-buttonhole sewing machine, having, in combination, stitch forming mechanism, a' rotary turret in which theamechanism is .mounted, a plurality of thread guides connected to rotate with the turret, a corresponding number of rotary thread-supply guides through which the threads lead to the turret guides, ashaft extending from a pointadjacent the supply guides to a point adjacent the turretguides, spreaders 0n the shaft providedwith guides for the threads, ---and driving connections for rotating the shaft in unison with the: thread-supply guides.

2. vA buttonhole sewing machine, having,

in combination, stitch forming mechanism,

2 a rotary turret in whichthe mechanism is :mounted, a'plurality of thread guides coninecte'deto rotate with the turret, oppositely rotating thread-supply guides, an approxi- Y mately horizontal. shaft-between the threadsupply and turret guides spreaders on the shaftprovided with thread-guides, and -driving connections for rotating the shaft in unison with the thread-supply and turret 1; guides. a

3. A buttonhole sewing machine, having, in combination, stitch forming mechanism, a'rotaryturretain which the. mechanism is mounted, a -pluralityof thread guides con- 5; nected torotate: with. the turret, an oppositelyrotating guide tube, an I approximately horizontal shaft between the guide tube and turret-guides, spreaderson the shaft pro- -;;vided withthreadguides, a link, a universal joint-:betweenthevend of the shaftand 1 one end of the link, a universal joint between the ther end of the link and the '1 guide-tube, and thread guides in the universal joints.

4L- A'buttonhole sewing machine, having, in combination, stitch forming mechanism, a rotary turretcinwhich the mechanism is mounted, a plurality of thread guides con- -nected to rotatexwithi the rotary turret, irthread-supply ,guides, a shaft between the thread-supply. and turret guides, spreader wand .journal disks won the shaft, thread -;guides inthe ispreader. and journal disks, and driving connections through which the shaft is-driven ,in unison with the supply and turret guides.

, 5, A buttonhole sewingmachine, having, in combination, stitch forming mechanism, a-=-rotary turretin which the mechanism is mounted, a plurality of: thread guides con- --nected-..to rotate withwthe rotary turret, wthread-supply.guides, a shaft between the thread-supply and turret guides, a, spreader ands-journal; disks on the shaft, thread guides in the spreader and journal disks, a

link and universal joints through which the mounted, a hollow link carried by the tur* shaft is driven in unison with the supply ret through which the stitch forming mechguides, and thread guides in the universal anism is actuated, and an outwardly flaring 1 3 joints. sleeve at the end of the link provided with 5 6. A buttonhole sewing machine, having, inturned thread guides for the sewing and in combination, stitch forming mechanism, stay threads. a rotary turret in which the mechanism is GEORGE S. HILL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

- Washington, D. G. 

